Out-of-bounds read in Linux kernel - CVE-2026-31782
Published: May 2, 2026
Vulnerability identifier: #VU128916
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-31782
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in intel_pmu_set_acr_caused_constr when handling groups of events that include software events during auto counter reload. A local user can trigger this condition to disclose sensitive information.
The issue occurs because a software event PMU may be processed through the hybrid helper path even though it is not an x86 event.
Remediation
Install security update from vendor's repository.